/*
 * yocef - Developer's guide
 *
 * Copyright (c) 2009, Yves Cuillerdier
 * All rights reserved.
 * 
 * This software is licensed under the new BSD License:
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the documentation 
 * and/or other materials provided with the distribution.
 * 
 * Neither the name of the author nor the names of its contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * @version 0.1.0
 */

package yocef.devguide.client.glue;

import yocef.client.Event;
import yocef.client.EventBind;
import yocef.client.EventGlue;
import yocef.client.EventParams;

import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.TextBox;

/**
 * Glue a GWT TextBox or PasswordTextBox with a "textChanged" event
 */
@SuppressWarnings("nls")
public class GwtTextBoxGlue extends EventGlue {

	/**
	 * Automatic glue
	 */
	public GwtTextBoxGlue() {
		// Notice that as PasswordTextBox extends TextBox, setting the Glue for
		// TextBox will also work for PasswordTextBox!
		super(TextBox.class);
	}

	@Override
	public boolean accept(final EventBind binding) {

		if (binding.getEvent() == Event.get("textChanged")) {
			// OK : Glue by setting a handler on the TextBox
			final TextBox textBox = (TextBox) binding.getSource();
			final KeyUpHandler handler = new KeyUpHandler() {
				@Override
				public void onKeyUp(KeyUpEvent event) {
					final EventParams param = new EventParams().//
							put("keycode", event.getNativeKeyCode());
					// ... add other properties here
					binding.getAction().handle(binding.getEvent(), textBox,
							binding.getContext(), param);
				}
			};
			HandlerRegistration hReg = textBox.addKeyUpHandler(handler);
			binding.addData("handler", hReg);
			return true;
		}
		if (binding.getEvent() == Event.get("gotFocus")) {
			// ...
			return true;
		}
		return false;
	}

	@Override
	public boolean release(final EventBind binding) {
		if (binding.getEvent() == Event.get("textChanged")) {
			final HandlerRegistration hReg = (HandlerRegistration) binding
					.getData("handler");
			hReg.removeHandler();
			return true;
		}
		return false;
	}
}
